refactor(admin): use named routes for admin index navigation

Replace Referer-based redirects in Admin Index back() and switchUser()
with named routes (admin.index and dashboard) for consistent navigation
behavior independent of the request header.

Add tests verifying back() returns to admin.index, switchUser routes to
the dashboard, and the Referer header is no longer consulted.

app/Livewire/Admin/Index.php

@@ -37,7 +37,7 @@ public function back()
             Auth::login($user);
             refreshSession($team_to_switch_to);
 
-            return redirect(request()->header('Referer'));
+            return redirect()->route('admin.index');
         }
     }
 
@@ -70,7 +70,7 @@ public function switchUser(int $user_id)
         Auth::login($user);
         refreshSession($team_to_switch_to);
 
-        return redirect(request()->header('Referer'));
+        return redirect()->route('dashboard');
     }
 
     private function authorizeAdminAccess(): void

tests/Feature/AdminAccessAuthorizationTest.php

@@ -1,6 +1,7 @@
 <?php
 
 use App\Livewire\Admin\Index as AdminIndex;
+use App\Models\InstanceSettings;
 use App\Models\Team;
 use App\Models\User;
 use Illuminate\Foundation\Testing\RefreshDatabase;
@@ -70,9 +71,9 @@
 test('switchUser requires root user id 0', function () {
     config()->set('constants.coolify.self_hosted', false);
 
-    $rootTeam = Team::find(0) ?? Team::factory()->create(['id' => 0]);
+    InstanceSettings::unguarded(fn () => InstanceSettings::query()->create(['id' => 0]));
     $rootUser = User::factory()->create(['id' => 0]);
-    $rootTeam->members()->attach($rootUser->id, ['role' => 'admin']);
+    $rootTeam = Team::find(0);
 
     $targetUser = User::factory()->create();
     $targetTeam = Team::factory()->create();
@@ -84,7 +85,47 @@
     Livewire::test(AdminIndex::class)
         ->assertOk()
         ->call('switchUser', $targetUser->id)
-        ->assertRedirect();
+        ->assertRedirect(route('dashboard'));
+});
+
+test('back() redirects impersonator to admin index and clears session', function () {
+    config()->set('constants.coolify.self_hosted', false);
+
+    InstanceSettings::unguarded(fn () => InstanceSettings::query()->create(['id' => 0]));
+    $rootUser = User::factory()->create(['id' => 0]);
+    $rootTeam = Team::find(0);
+
+    $this->actingAs($rootUser);
+    session([
+        'currentTeam' => ['id' => $rootTeam->id],
+        'impersonating' => true,
+    ]);
+
+    Livewire::test(AdminIndex::class)
+        ->call('back')
+        ->assertRedirect(route('admin.index'));
+
+    expect(session('impersonating'))->toBeNull();
+});
+
+test('switchUser ignores Referer header and uses dashboard route', function () {
+    config()->set('constants.coolify.self_hosted', false);
+
+    InstanceSettings::unguarded(fn () => InstanceSettings::query()->create(['id' => 0]));
+    $rootUser = User::factory()->create(['id' => 0]);
+    $rootTeam = Team::find(0);
+
+    $targetUser = User::factory()->create();
+    $targetTeam = Team::factory()->create();
+    $targetTeam->members()->attach($targetUser->id, ['role' => 'admin']);
+
+    $this->actingAs($rootUser);
+    session(['currentTeam' => ['id' => $rootTeam->id]]);
+
+    Livewire::withHeaders(['Referer' => 'https://example.com/elsewhere'])
+        ->test(AdminIndex::class)
+        ->call('switchUser', $targetUser->id)
+        ->assertRedirect(route('dashboard'));
 });
 
 test('switchUser rejects non-root user', function () {